CN-122014161-A - Coal-rock gas pressure-stabilizing drainage and extraction device and method

Abstract

The invention provides a coal rock gas pressure stabilizing and discharging and mining device and a method, which belong to the technical field of oil gas exploitation, the device comprises a gas pipe, a pressure stabilizing tank, a gas-liquid separation mechanism, a first filtering mechanism and a second filtering mechanism, wherein a plurality of branch pipes are arranged on the gas pipe in parallel, each branch pipe is provided with the pressure stabilizing tank, the output end of the gas pipe and the output ends of the plurality of branch pipes are communicated with the gas-liquid separation mechanism, a first filtering mechanism for filtering gas is arranged above the gas-liquid separation mechanism, and a second filtering mechanism for filtering waste liquid is arranged below the gas-liquid separation mechanism. The invention is provided with the gas-liquid separation mechanism, a plurality of cooling plates are arranged in the gas-liquid separation mechanism in a staggered way, so that the separation efficiency of water vapor is effectively improved, the scraping plate mechanism is arranged on the cooling plates, and the water condensed on the cooling plates and impurities mixed in the water are scraped by the scraping plate mechanism, so that the impurities are prevented from remaining on the cooling plates, and the gas-liquid separation mechanism can be effectively used for a long time.

Inventors

• DU ZHIWEN
• Xi Liying
• QIANG XIAOLONG
• LI HAO
• GONG XIAOKE
• YUAN DAN
• LI BOYUAN
• JIANG TINGTING
• WEN KAIFENG
• Meng Fengming
• XU GUANGJUN
• ZHANG TAO
• LIU MINGJIAN
• SUN LONG
• Dou Yugang
• Liang Jiatong

Assignees

• 中国石油天然气股份有限公司

Dates

Publication Date

20260512

Application Date

20241111

Claims (10)

1. 1. The coal rock gas pressure stabilizing and discharging device is characterized by comprising a gas conveying pipe (1), a pressure stabilizing tank (2), a gas-liquid separation mechanism (3), a first filtering mechanism (4) and a second filtering mechanism (5), wherein a plurality of branch pipes (11) are arranged on the gas conveying pipe (1) in parallel, the pressure stabilizing tank (2) is arranged on each branch pipe (11), the output end of the gas conveying pipe (1) and the output end of the plurality of branch pipes (11) are communicated with the gas-liquid separation mechanism (3), the first filtering mechanism (4) for filtering gas is arranged above the gas-liquid separation mechanism (3), and the second filtering mechanism (5) for filtering waste liquid is arranged below the gas-liquid separation mechanism (3); The gas-liquid separation mechanism (3) at least comprises a shell (31) and cooling plates (32), wherein a plurality of cooling plates (32) are obliquely arranged in the shell (31) in a staggered mode, cooling pipes are arranged in the cooling plates (32), the cooling pipes are connected with an external cooling circulation mechanism, the shell (31) is further provided with a scraping plate mechanism (33) in a sliding mode, and the scraping plate mechanism (33) is driven by a driving mechanism (34).
2. 2. The coal and rock gas steady pressure drainage and production device according to claim 1, wherein the scraping plate mechanism (33) at least comprises a sliding seat (331), a sliding block (332) and a scraping plate (333), a plurality of sliding grooves (311) are formed in the shell (31), the sliding seat (331) slides along the sliding grooves (311), the sliding blocks (332) are arranged at the upper end and the lower end of the sliding seat (331) in a sliding mode, and the scraping plate (333) is fixedly arranged on the sliding blocks (332).
3. 3. The coal gas steady pressure drainage and mining device according to claim 2, wherein one end, far away from the cooling plate (32), of the sliding block (332) is fixedly provided with a clamping plate (334), two upper ends and lower ends of the clamping plate (334) are provided with support plates (335) in a sliding mode through springs I, a sliding rail I (312) is arranged on the shell (31), clamping grooves (313) are formed in the left end and the right end of the sliding rail I (312), the two support plates (335) are respectively clamped into the two clamping grooves (313), and the support plates (335) are clamped into the sliding rail I (312) and slide along the corresponding sliding rail I (312).
4. 4. The coal and rock gas steady pressure drainage and mining device according to claim 1, wherein the driving mechanism (34) at least comprises a driving seat (341) and a guide rod (342), two guide rods (342) are fixedly arranged on the driving seat (341), a plurality of second sliding rails (314) are arranged on the shell (31), two straight grooves (336) are arranged on a sliding seat (331) of a scraping plate mechanism (33) in the gas-liquid separation mechanism (3), a chute (337) is arranged on a sliding block (332) of the scraping plate mechanism (33) in the gas-liquid separation mechanism (3), the guide rods (342) are clamped into the second sliding rails (314) and slide along the second sliding rails (314), and the two guide rods (342) respectively penetrate through the two straight grooves (336) and are clamped into the chute (337) on the sliding blocks (332) at two ends of the sliding seat (331).
5. 5. The coal and rock gas steady pressure drainage and production device according to claim 4 is characterized in that a plurality of driving seats (341) are arranged, the driving seats (341) are fixedly connected through the same driving rod (35), a screw rod (315) is rotatably arranged on the shell (31), and threads matched with the screw rod (315) are formed in the driving rod (35).
6. 6. The coal and rock gas steady pressure drainage and extraction device of claim 1, wherein a water collecting channel (316) is formed in the shell (31), the output end of the cooling plate (32) is located in the water collecting channel (316), a water collecting tank (317) is arranged at the output end of the water collecting channel (316), the bottom of the water collecting tank (317) is obliquely arranged, the water collecting tank (317) is communicated with a second filtering mechanism (5) through a water pipe (318), the second filtering mechanism (5) is communicated with an external waste water purifying mechanism, and the waste water purifying mechanism is communicated with a cooling circulation mechanism.
7. 7. The coal and rock gas steady pressure drainage and extraction device according to claim 1, wherein the output end of the cooling plate (32) is rotatably provided with a plurality of knocking mechanisms (36), each knocking mechanism (36) comprises a rotary table (361) and knocking blocks (362), a plurality of limit grooves are formed in the rotary table (361) along the circumference, the knocking blocks (362) are rotatably arranged in the limit grooves, and a second spring (363) is arranged between the knocking blocks (362) and the rotary table (361).
8. 8. The device for stabilizing and discharging and collecting coal and rock gas according to claim 7, wherein the output end of the knocking block (362) is obliquely arranged.
9. 9. The coal and rock gas steady pressure drainage and extraction device of claim 7, wherein a stop lever (321) is fixedly arranged at the output end of the cooling plate (32), and the stop lever (321) stops the knocking block (362) and drives the knocking block (362) to rotate.
10. 10. The mining method of the coal rock gas pressure stabilizing mining device according to any one of claims 1-9, which is characterized by comprising the following specific steps: realize the steady voltage drainage of oil gas through surge tank (2), later let in gas-liquid separation mechanism (3) with the oil gas of gathering, get rid of the steam in the oil gas through gas-liquid separation mechanism (3) to utilize scraper blade mechanism (33) to clean cooling plate (32) in gas-liquid separation mechanism (3), later let in filtering mechanism one (4) with the oil gas after the dehydration and filter and collect, and let in filtering mechanism two (5) with waste water and carry out preliminary filtration, later let in cooling circulation mechanism after carrying out purification treatment with the waste water after the filtration and carry out reuse.

Description

Coal-rock gas pressure-stabilizing drainage and extraction device and method Technical Field The invention belongs to the technical field of oil and gas exploitation, and particularly relates to a coal and rock gas pressure stabilizing drainage device and method. Background The coal-rock gas is a new natural gas resource type between conventional gas and coal bed gas, has the characteristics of coexistence of conventional reservoirs and unconventional reservoirs, symbiosis of free gas and adsorption gas, complementary aggregation and orderly distribution of self-source gas and self-source gas, and needs a voltage stabilizing device to ensure high yield when the coal-rock gas is mined. The system mainly comprises a gas cylinder, an outlet pressure reducing valve, an automatic regulating electromagnetic valve, a sensor, a signal processor, a pneumatic valve, an exhaust port and a reaction kettle, wherein the system uses the idea of feedback regulation, the sensor is used for transmitting a gas pressure signal in the reaction kettle, and the signal processor is used for converting the gas pressure signal into a control instruction to control the on-off of the automatic regulating electromagnetic valve, and meanwhile, the automatic regulating electromagnetic valve is used for controlling the on-off of the pneumatic valve so as to control the pressure in the reaction kettle. At present, the pressure stabilizing device for the gas production process generally adopts a pressure stabilizing tank to regulate the gas production pressure, and impurities such as water vapor and coal dust are mixed in oil gas during the gas production, and then the water vapor in the oil gas is required to be separated during the gas production, and the impurities are filtered to obtain relatively clean oil gas, the existing device for separating the water vapor of the oil gas is generally a gas-liquid separator, the principle is mainly that the water vapor in the oil gas is condensed into water and then separated from the oil gas through a low-temperature environment, and when the water vapor is actually used, the impurities such as the coal dust are mixed in the oil gas, and then the impurities such as the coal dust are doped in the water to become sewage when the water vapor is condensed into water, the sewage is easy to attach the impurities inside the device when flowing along the gas-liquid separator, the long-term use is easy to cause impurity accumulation, and then the effect of gas-liquid separation is influenced, so that the water vapor separation in the oil gas is not completely separated, and the subsequent filtering work is further troublesome, and the quality of the collected oil gas is further influenced. Therefore, it is necessary to provide a coal-rock gas pressure-stabilizing drainage device to solve the problems in the prior art. Disclosure of Invention In order to solve the problems that the water vapor in the existing oil gas is not completely separated, thereby causing trouble to the subsequent filtering work and further influencing the quality of the collected oil gas, the invention provides a coal rock gas pressure stabilizing and discharging device and a method, the invention is provided with a gas-liquid separation mechanism, a plurality of cooling plates are arranged in the gas-liquid separation mechanism in a staggered way, so that the contact area between the oil gas and the cooling plates is increased after the oil gas enters the gas-liquid separation mechanism, and then make the steam in the oil gas can fully contact the cooling plate and condense into water, effectively improve the separation efficiency of steam to set up scraper blade mechanism on the cooling plate, strike off the impurity of water and mixing in water that will condense on the cooling plate through scraper blade mechanism, and then prevent to remain the impurity on the cooling plate, make gas-liquid separation mechanism can long-term effectual use. The invention adopts the technical scheme that: The utility model provides a coal rock gas steady voltage drainage and extraction device, includes gas-supply pipe, surge tank, gas-liquid separation mechanism, filtration mechanism one and filtration mechanism two, the gas-supply pipe on be connected in parallel and be provided with a plurality of minutes pipe, all be provided with the surge tank on every minute pipe, the output of gas-supply pipe and the output of a plurality of minutes pipe all communicate with gas-liquid separation mechanism, gas-liquid separation mechanism top be provided with the filtration mechanism one that is used for filtering gas, gas-liquid separation mechanism below be provided with the filtration mechanism two that is used for filtering the waste liquid; the gas-liquid separation mechanism at least comprises a shell and cooling plates, wherein a plurality of cooling plates are obliquely arranged in the shell in a staggered manner, cooling pipes are arranged in the c